Sheep shear



March 5, 1929.

M. w. M mmy:

SHEEP SHEAR um lay 12, 1928 2 Shoots-Sheet 2 fizz/672240? Jfz'chzel Wilfa/Yrdie Patented Mar. 5, 1929.

UNITED STATES PATENT OFFICE.

MICHAEL W. MOARDLE, OF CHICAGO, ILLINOIS.

SHEEP SHEAR.

Application filed May 12,

The purpese of this invention is to provide in sheep shear an improved construction for adjusting the comb plate in :lore-and-aft direction for maintaining the line oi cut at desired point on the fixed comb throughout changes in the length of the teeth of the vibrating cutter due to grinding the latter. It consists in the elements and features of construction shown and described indicated in the claims.

In the drawings:

Figure 1 is a bottom plan view of a sheep shear embodying this invention.

Figure 2 is a vertical i'ore-andaift medial section of the same.

Figure 3 is a section at the line 3-3 on Figure 2. t

Figure 4 is a top plan view of the fixed comb and cutter detached from the tool.

Figure 5 is a dissected perspective view of an operating member concerned in the adjustment of a comb plate for the purpose of V the invention.

Figure 6 is a view similar to Figure 1 showing a modified construction.

Figure 7 is a section at the line 77 on Figure 6. i

Figure 8 is a view similar to Figure 3 showing a modified construction.

Figure 9 is a view similar to Figure 4 showing the same modification.

Figure 10 is a view similar to Figure 5 showing the same modification.

In the construction shown in the drawings the sheep shear illustrated comprises a body member, A, upon the under side 0twhich there is mounted adjustably a comb plate, B, which projects forwardly of the body for exposing its upper surface for the lodgment and reciprocation thereon of the vibrating cutter, C, which is actuated for its vibratory movement by the vibrating lever, D, fulcrumed at D and engaging the vibrating cutter in a familiar manner by connections which are familiar and which require no further description here. To adapt the fixed comb and cutter for fore-and-aft adjustment on the body it is held to the under side of the body by screws, E, engaging fore-and-att extending slots, 6, in the fixed comb and cutter, B. For adjusting the fixed comb and cutter in fore-and-ait direction for the purpose stated it has a rearwardly extending stem, B projecting from between the slots, 6, and the stem constitutes at its rear part a rack bar having rack teeth, b formed by 1928. SerialNo. 277,155.

transversely grooving the stem on its upper surface. Immediately above the position of the stem when the comb plate is in place on the body, the body has a recess, A, and transversely thereof the body is bored for seating the rock shaft comprising members, F, F for carrying and actuating a gear segment member, (blocated in the recess A and protruding its gear teeth downwardly from said recess for engagementwith the teeth of the rack formed as described on the stem of the comb plate.

The recess, A, is dimensioned to permit the rocking ot' the shaft forswinging the gear segment through a suflicient are to cause it to actuate the comb plate in fore-and aft direction to the maximum distance required for the adjustment mentioned for maintaining the line of cut as desired with respect to the vibrating cutter teeth.

For economy of production and convenience of assemblage of the parts the rock shaft is made in two parts, F and F, as mentioned, and said twoparts are introduced respectively from the opposite sides of the body having an extended portion toward theirinner ends squared as seen at f for engaging square apertures, g, in the radial stems,-(} of the gear segment into which the squared ends of the rock shaft members are entered from opposite sides of the body,

said shaft members having one a centering pin, f and the othcra central bore, if", to receive the pin and center the shaftmembers relatively to each other when bot-hare introduced to their working position inv the bearing. j For operating the rock shaft the opposite ends of each of the shaft members, F, F, are formed for engagement by a suitable key, the construction shown being that said ends are slotted for engagement by a screw driver.

In the form illustrated in Figures 6, 7, 8, 9 and 10 there are provided two separate segment gear members, G, G", for which later ally separated recesses, A, A are formed in the under side of the body, A; and the comb plate has formed in its 11 per surface at positions corresponding to t e recesses, A A, laterally separated racks, b 7); and a for mounting and operating the gear segments, G, G they are each formed similarly to the segment gear, G, having their radial stems, G provided with square apertures, g. The body, A, is bored transversely to form a reduced journal hearing at a", a, at the left hand side referring to Figure 8), and counter-bored from the right hand side to form a larger diameter being at ed, at the right hand side of the body, and the operating rock shaft, F, is unitary, diametered at the right hand end for journalling in the bearing, (b and the left hand end for journalling in the lesser bearing, e and squared at an intermediate portion of its length, ,t tor fitting the (uared aperture, 9, of the segment gear stems.

This term has the advantagg'e that it avoids the liability which may arise in the form shown in the earl icr figures, of the comb beingslightly more ctarded b triction at its guidance on one oi. the guide and clamp screws, E, than at the other, 7 and thereby turned slightly f om the correct fore and all; position of the comb teeth, which would slightly distort the line of cut.

I claim 1. In a sheep shear ant, the like having a body member and a fixed comb plate mounted on the under side of the body member, and a vibrating cutter lodged on the upper side of the fixed comb plate, the latter being ad ust able on. the body and with respect to the vibrating cutter in tore-a3 sqtt direction, means for adjusting the co plate comprising a rack bar stem entenuii'ig rearwardly from the comb plate und the body, having its rack teeth at its upper side; reel: shaft mounted in the body above said racl: bar stem, and a segment gear carried by the rock shaft engaging the rack bar, an end of the reel; shaft being exposed at the side of the body and adapted for engagement for rocking the sh attto adjust the comb plate.

2. In a sheep shear and the like having a body member and a lined comb plate moun ed on the underside of the body member, and a vibrating cutter lodged on the upper side of the fixed comb plate, the comb plate being; adjustable on the body With respect to the Vlbrating cutter in fore-and-aft direction; means for adjusting the comb plate comprising a rack on the comb plate at the upper side thereof the body member having a recess in e out or Slt'lQ overhaim iug said rack; a sege mm,

shaft journaled in the body the segment gear, and c1:- teriorly accessible for rocking the shalt.

3. In a sheep shear and the like having a ody member and a lined comb plate mounted under site of the body member, and a lo: ped on the u iper side of d )plate, the comb plat being adbody and respect to the in tore-and-attt direction,

listing the comb plate comprisau upr-xardly fat" ack on the comb re, a wement gear in ing with the rack andh 'irug arq'ally pmsitionsul non-circular ape]. a; a rock she journalled in the body and insertable into its beriu'ings from one side of the body, zuicei sible "tor operation at the oi len srth non-circular in cross section titled to en e the rum-circular aperture of ar. f) shear and the like having a body men'ibor an l a tilted comb plate mounted on the and *1 side of "he body member, and a vibrating c titer lodged on the upper side of the fitted comb plate, the comb plate being adin -table on the body and with respect to the Vibrating cutter in tore-and-att direction; means "listing the comb plate comprisouter end and having an intermediate portion f {Hi} me two upwardly facing raclcs at opposite sides at a medial tore-and-al t line of the comb plate; segn'ientgears meshing said racks respectively; a. rock shaft journalled in the body and extending therethrough from side to side rotatively engaged with both segment gears and accessible and adapted for engagement at both ends tor rotating it to operate the raclts and adjust the comb plate in fore-andalt direction.

ln testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 9th day of May, 1928.

MICHAEL W. MCAEDLE. 

